1.

\frac { 9 } { I } \times \frac { S } { \varepsilon } - \frac { \tau } { S } + \frac { S } { \varepsilon } \times \frac { \varepsilon } { Z } -

Answer»

-2/3*3/5+5/2-3/5*1/6-2/5+5/2-1/10-4+25/10-1/1021/10-1/10=20/10=2

thanks



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